A common method of leak detection is the use o f a leak detecting solution such as a water/soap solution (Figure SP-1-2). Its main advantages…
Category: Consideration
Making current measurements with a multimeter is different than making other measurements with a multimeter. Current measurements are made in series, unlike voltage or resistance…
Analog (VOM) and digital (DMM) multimeters are used to measure voltage (volts), resistance (ohms), and current (amperes). Some can be used to make other measurements…
Voltage measurements are usually made to determine source voltage, voltage drop, and/or voltage imbalance. Be sure to always connect the multimeter across (in parallel with)…
Multimeters can measure the resistance in ohms (£2) of all or any part of the circuit. Resistance values o f HVAC components can vary greatly…
Ammeters measure current flow through a circuit. Depending on the level of the current being measured, the ammeter reads in amperes, milliamperes (one thousandth of…
The procedure used for disconnecting the gauge manifold set varies, depending on the type of service valves installed in the unit. If the unit being…
For years, refrigerant has been used to purge air from the service hoses prior to making the final connection to the unit. Obviously this causes…
Figure 3-15 shows how the flow of refrigerant through the gauge manifold set is controlled. The hand valve on the left controls the flow to…